dashboard: remove nacl builders from the master branch

CL 190998 broke the nacl-386 builder, but nacl support is being
dropped as of Go 1.14 anyway.

Updates golang/go#30439

Change-Id: If9a7ea1230d4af0a127aeb14005063be4092cf84
Reviewed-on: https://go-review.googlesource.com/c/build/+/192537
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/dashboard/builders_test.go b/dashboard/builders_test.go
index 38a5d01..6a029d9 100644
--- a/dashboard/builders_test.go
+++ b/dashboard/builders_test.go
@@ -95,12 +95,10 @@
 				"misc-compile-solaris",
 				"misc-compile-freebsd",
 				"misc-compile-mips",
-				"misc-compile-nacl",
 				"misc-compile-netbsd",
 				"misc-compile-openbsd",
 				"misc-compile-plan9",
 				"misc-compile-ppc",
-				"nacl-amd64p32",
 				"openbsd-amd64-64",
 				"windows-386-2008",
 				"windows-amd64-2016",
@@ -120,7 +118,6 @@
 				"misc-compile-freebsd",
 				"misc-compile-linuxarm",
 				"misc-compile-mips",
-				"misc-compile-nacl",
 				"misc-compile-netbsd",
 				"misc-compile-openbsd",
 				"misc-compile-other",
@@ -393,9 +390,11 @@
 		{b("android-amd64-emu", "go"), isBuilder},
 		{b("android-386-emu", "go"), isBuilder},
 
-		{b("nacl-386", "go"), onlyPost},
+		{b("nacl-386", "go"), none},
+		{b("nacl-386@go1.13", "go"), onlyPost},
 		{b("nacl-386", "net"), none},
-		{b("nacl-amd64p32", "go"), both},
+		{b("nacl-amd64p32", "go"), none},
+		{b("nacl-amd64p32@go1.13", "go"), both},
 		{b("nacl-amd64p32", "net"), none},
 
 		// Only test tip for js/wasm, and only for some repos: